Microwave-catalyzed pyrolysis of waste engine oil using steel slag catalyst: Structure design and insights into the intrinsic mechanism of active catalytic sites and microwave absorption functions

Hou, Jiahui; Lin, Junhao; Lin, Fang; Zhang, Xi; Ma, Rui; Luo, Juan

doi:10.1016/j.cej.2023.144171

Cited by 5 publications

(4 citation statements)

References 58 publications

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“…A certain RhB concentration can be determined through the standard calibration curve (Figure S2). The RhB removal efficiency can be evaluated under different reaction conditions through Equation (10):…”

Section: Rhb Removal Efficiencymentioning

confidence: 99%

“…RhB removal efficiency = (1 − C t /C 0 ) × 100%, (10) where C t represents the RhB concentration at a certain reaction time, and C 0 represents its initial concentration (10 mg L −1 ). The energy consumption of the 3DER (E, Wh L −1 ) was evaluated through Equation (11), where U(V) refers to the average voltage throughout the electrochemical reaction, U = (U 0 +U t ) 2…”

Section: Rhb Removal Efficiencymentioning

confidence: 99%

“…Moreover, the transition metals in SS may make it catalytic. Wang et al, Li et al, Hou et al, and Lai et al evaluated the catalytic ability of SS, prepared some novel catalysts, and used them to activate oxidants, e.g., PS and H 2 O 2 , for removing organics from water [ 9 , 10 , 11 , 12 ]. However, these catalysts were primarily nanoscale materials that easily agglomerated in the electric field, resulting in a substantial loss of catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

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Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes

Ren,

Fu,

Peng

et al. 2024

Molecules

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Developing a green, low-carbon, and circular economic system is the key to achieving carbon neutrality. This study investigated the organics removal efficiency in a three-dimensional electrode reactor (3DER) constructed from repurposed industrial solid waste, i.e., Mn-loaded steel slag, as the catalytic particle electrodes (CPE). The CPE, a micron-grade material consisting primarily of transition metals, including Fe and Mn, exhibited excellent electric conductivity, catalytic ability, and recyclability. High rhodamine B (RhB) removal efficiency in the 3DER was observed through a physical modelling experiment. The optimal operating condition was determined through a single-factor experiment in which 5.0 g·L−1 CPE and 3 mM peroxymonosulfate (PMS) were added to a 200 mL solution of 10 mM RhB under a current intensity of 0.5 A and a 1.5 to 2.0 cm distance between the 2D electrodes. When the initial pH value of the simulated solution was 3 to 9, the RhB removal rate exceeded 96% after 20 min reaction. In addition, the main reactive oxidation species in the 3DER were determined. The results illustrated that HO• and SO4•− both existed, but that the contribution of SO4•− to RhB removal was much lower than that of HO• in the 3DER. In summary, this research provides information on the potential of the 3DER for removing refractory organics from water.

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Section: Rhb Removal Efficiencymentioning

confidence: 99%

Section: Rhb Removal Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes

Ren,

Fu,

Peng

et al. 2024

Molecules

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“…However, the use of SiC has some disadvantages related to its cost, large amount required for upscaling, and formation of amalgamation with by-products of pyrolysis process. In another study, Hou et al 20 have employed the steel slag catalyst (SSC) containing Fe 2 O 3 , Fe 3 O 4 , and MnFe 2 O 4 as an absorber in MW pyrolysis for recovery of bioenergy from waste engine oil by converting into bio-oil. In this study, SSC was activated by alkaline and acidic pretreatments, which provided a maximum temperature of ~ 650 °C in 15–20 min under MW irradiation for pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the microwave heating performance of biochar as microwave absorber for microwave-assisted pyrolysis technology

Singh,

Lindenberger,

Chawade

et al. 2024

Sci Rep

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Microwave (MW) heating has gained significant attention in food industries and biomass-to-biofuels through pyrolysis over conventional heating. However, constraints for promoting MW heating related to the use of different MW absorbers are still a major concern that needs to be investigated. The present study was conducted to explore the MW heating performance of biochar as a low-cost MW absorber for performing pyrolysis. Experiments were performed on biochar under different biochar dosing (25 g, 37.5 g, 50 g), MW power (400 W, 700 W, 1000 W), and particle sizes (6 mm, 8 mm, 10 mm). Results showed that MW power and biochar dosing significantly impacted average heating rate (AHR) from 17.5 to 65.4 °C/min at 400 W and 1000 W at 50 g. AHR first increased, and then no significant changes were obtained, from 37.5 to 50 g. AHR was examined by full factorial design, with 94.6% fitting actual data with predicted data. The model suggested that the particle size of biochar influenced less on AHR. Furthermore, microwave absorption efficiency and biochar weight loss were investigated, and microwave absorption efficiency decreased as MW power increased, which means 17.16% of microwave absorption efficiency was achieved at 400 W rather than 700 W and 1000 W. Biochar weight loss estimated by employing mass-balance analysis, 2–10.4% change in biochar weight loss was obtained owing to higher heating rates at higher powers and biochar dosing.

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Microwave-assisted catalytic pyrolysis of biomass with biochar materials derived from spent lithium-ion batteries: Microwave absorption and pyrolysis characteristics

He,

Zhao,

Wang

et al. 2024

Journal of Environmental Chemical Engineering

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Microwave-catalyzed pyrolysis of waste engine oil using steel slag catalyst: Structure design and insights into the intrinsic mechanism of active catalytic sites and microwave absorption functions

Cited by 5 publications

References 58 publications

Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes

Intensive Treatment of Organic Wastewater by Three-Dimensional Electrode System within Mn-Loaded Steel Slag as Catalytic Particle Electrodes

Unveiling the microwave heating performance of biochar as microwave absorber for microwave-assisted pyrolysis technology

Microwave-assisted catalytic pyrolysis of biomass with biochar materials derived from spent lithium-ion batteries: Microwave absorption and pyrolysis characteristics

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